Automatic double air-inlet for carbureters.



J. LE PLAIN.

AUTOMATIC DDUBLE AIR INLET FOR GARBURETERS.

APPLICATION FILED MAR. 24, 1908.

Patented Dec. 8, 1908 To all whom it may concern: Be it known that I, JU'LLEN LE PLAIN, citinnrran snares learner enrich.

JULIEN LE PLAIN, OF .ANDOVEBSFORD, ENGLAND.

AUTOMATIC DQUBLE AIR-INLET FOR CARBURETERS.

Specification of Letters Patent.

Application am March as, was. seen No. azao'os.

T PetentedDecr-B, il -E08.

zen of France, residing at Dowdeswell Court, Andover'sford, R. S. 0., Gloucestershire, England, have invented new and useful Improvements in Automatic Double Airlnlets for Carbureters, of which the following is a specification. I

This invention has for its object a system of air admission which when applied to carbureters with two air inlets plays the part of an additional automatically operating air inlet, and which when applied to carburetors with a single air inlet simultaneously plays the part ot a permanently open air inlet and that of an additional automatically operatingair inlet.

To this end the invention comprises an ohi turating cylinder which can be displaced longitudinally in a casing having openings at the level of the two ends of the obturator.

screw device with nuts and counter-nuts permits either of keeping the obturator atquence insures the rising of said cylinder when the vacuum has ceased. A metal bell incloses the mechanism.

In the annexed drawing is shown an embodiment of the apparatus.

Figure 1 is a vertical section through the axis of the apparatus. Fig. 2 is an exterior View of the apparatus, the bell being re moved. .Fig. 3 1s a section following the line A A of Fig. 1.

The obturating cylinder a, open at both ends, carries atits upper openlng a cross piece p on which is bolted a stem 8 which can ries at its upper end, which is screw threaded for this purpose, a nut and counter nut u t. Thiscylmder a is movable in the interior of a second cylinder, 5, the lower part of which,

where are provided the openings 0, is '{of a greater diameter than that of thejupper part which is rovided with openings n. The cylinder a can obt-urate the orifices n by its upper edge and prevent communication between the orifices c and thefinterior of the carburetor by its lower part which is widened to form a cone e. A screw g traverses the cover of thecyhnder 6 through a screw-threaded hole and is retained immovable in desired position by a nut r. 'l he cy lind'er b is seciired to the carbureter by its'i screw threaded part '0. Two small osdillating' pieces in each supported in its middle part by a small axle it fixed on the exterior surface of the voy linder Z), have loosely journaled in one end of each, one end of a spindle i which, traversing the cylinder (1 through two circu lar holes adjusted to its diameter, is solid with said cylinder, and which, traversing 79 the cylinder (2 through two vertical elongatedslots y, can follow the movements of the cylinder a. The other two ends Z of the pieces it support a'solid cylindrical block 51' which slides on the exterior surface of the cylinder I) and is guided in this movement by a lug g and groove f.

When there is n'ovacuum in the carbureter or when the vacuum ceases, the cylinder at,

aided by the counter weightj always tends 80 to rise as high as possib e. This course is limited by the abutment of the not a: on the end of the screw 9, while the abutment of the nut t on the screw 9 limits the opposite movement. ciently low, so that the cylinder a at the top of its movement does-not completely obturate the opening a, there will be permanent communication between the carhureter and the atmosphere through the hole ea Qhis will beso when the apparatus is applied to a carburetor with a single air inlet. If the vacuum is sufiicient, the obturator will be automatically moved towards the bottom and there will be an additional admission as through the holes a. Inversely, if the mrew g is sufficiently high, a and c are normally closed and will not open except at each vacuum; this corresponds to the case where the apparatus is applied to one of the inlets of 106 a carbureter with two air inlets so as to regulate only the admission of additional air.

Having now described my invention, what I claim as new and desire to secure by Let-- ters Patent is:

1. An automatic double acting air inlet for carburetors com rising in combination an obturating cylin' er a: open at both ends,

'a second cylinder 6 in which the obturating cylinder can move vertically, openings n pro- 110 vided at the upper end of said second cyling der and capab e of being closed by the upper Thus, if the screw. 9 is sufiithe purpose set edge of the obturating cylinder, an enlarged part formed at the lower end of said second cylinder and provided with air inlet openings a, a widenedpart 6 formed at the lower end of the obturating cylinder of closing the annular chamber into which lead the air inlet opening 0, and yielding means adapted to keep the obturating cylinder at a certain height suflicient to close one or both of the series of air inlets in the cylindercb,'substantially as described and for forth. 2. An automatic double acting air inleti for carbureters comprising in combinationl an obturating cylinder at open at both ends, a cross piece p provided at thetop of said obturating cylinder, a stem .9 bolted on said cross piece and having its upper end screw 1 threaded, a nut and counter-nut u t screwed l in the upper end of said stem, a second cyl inder b which is provided with a top cover and in which the obturating cylinder at can move vertically, a screw screwed through the top cover of the second cylinder 1) and provided with a central perforation through which passes loosely the stem 8, openings n provided at the upper end of said second cylinder and capable of being closed by the upper edge of the obturating cylinder, an enlarged part formed at the lower end of said second cylinder and provided with air inlet openings c, a widened part 6 formed at the lower end of the obturating cylinder a and capable of closing the annular chamber into which lead the air inlet opening 6:, and yielding means adapted to keep the obturating cylinder at a certain height sufficient to close one or both of the series of airinlets in the cyl-' inder b, substantially as described and for the purpose set forth.

3. An automatic double acting air inlet for carbureters comprising in combination an obturating cylinder at open. at both ends, 1

a and capable in the which lead the air inlet opening 0,

, middle part second cylinder, and for the purpose set eoaose a cross piece p provided at the top of said obturating cylinder, a stem 5 bolted on said cross piece and having its upper end screwthreaded, a nut and counter nut in t screwed upper end of Said stem, a second cylinder b which is prc Jided with a top cover and in which the obturating cylinder (4 can move vertically, a screw g screwed through the top cover of the second cylinder 7) and provided with a central perforation l'l'irough which passes loosely the stem 5, openings 11- provided at the upper end of said second cylinder and capable of being closed by the upper edge of the obturating cylinder, an enlarged part formed at the lower end of the said second cylinder and provided with air inlet openings 0, widened part 6 formed at the lower end of the obturating cylinder a and capable of closing the annular chamber into two small oscillating pieces it each supported in its by a small axle /L fixed on the exterior surface of the second cylinder, a spindle 2'- traversing the obturating cylinder a through two circular holes adjusted to its diameter and connected to one of the ends of each oscillating piece, two vertical elongated slots y which are formed diametrically opposite each other in the second cylinder 1) and along which is adaptedto move freely the spindle z, and a solid cylindrical block or counterweight j adapted to rest on the other free ends of the oscillating pieces In and to slide on the exterior surface of the substantially as described forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

- JULIEN LE PLAIN. Witnesses:

ANDREW R. Doxsnr, H. D. Jameson. 

